Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
EVEN SILK, THOUGH THE SKIN
For sewing normal sewing machine materials such as tough leather or canvas, offer to complete the regular presser foot or to make a new one. It is necessary that the cloth was not...
BED FOR GROWTH
Children, like mushrooms, grow by leaps and bounds: only yesterday everything was just right, and today, and the shoes are too tight, and the sleeves are short, and the cap is small....
